Roof Hugger’s are 10’ long, tested, high strength, structurally correct, 16 ga., 0.060”min., G-90, 50 ksi, “Z” shaped sub-purlins, specifically notched to let the ribs of any existing metal panel pass through the vertical leg of the “Z”. This unique retrofit system allows any new metal roof to be installed over any existing metal roof without its removal; saving time and money while upgrading the existing building to current code requirements for wind, snow and thermal resistance.